expanse not far from the neighborhood. he has alzheimers and wandered off before, not like this. >> nothing, nothing that, lasted for more than maybe an hour or so. >> people can go for miles, some times. we have hundreds of reports every year here in fairfax county. of people walking away. >> reporter: this is a huge park. deeper into the wood there are swamps, boggs, coupled with the fact there has been a storm, between now and the time he went missing. it will make things more complicated but not impossible for the search dogs. as they fan out, a family can only wait under a painful emptiness of not knowing, remembering, a strong, hard work, loving father figure before the grep of alip of alzh. we say typically such cases end with the person being found unfortunately with the situation there has ben no sign. dareic ward, news 4.